/Engine/Source/Runtime/Engine/Public/WorldPartition/ErrorHandling/WorldPartitionStreamingGenerationLogErrorHandler.h
Called when a data layer is not of the same type as its parent
virtual void OnDataLayerHierarchyTypeMismatch ( const [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * DataLayerInstance, const [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * Parent )